APA (7th ed.) Citation

Gregory, R. H., & Van Horn, R. L. (1963). Business data processing and programming (2nd ed.). Chatto and Windus.

Chicago Style (17th ed.) Citation

Gregory, Robert Henry, and Richard L. Van Horn. Business Data Processing and Programming. 2nd ed. London: Chatto and Windus, 1963.

MLA (8th ed.) Citation

Gregory, Robert Henry, and Richard L. Van Horn. Business Data Processing and Programming. 2nd ed. Chatto and Windus, 1963.